7 L 2 2

Shelly and Jason are siblings, but Shelly looks like their father while Jason looks like their mother. Which of the following statements best explains the difference in Shelly’s and Jason’s features?

• Shelly inherited a greater number of chromosomes from their father than Jason did.

• Shelly inherited a smaller number of X chromosomes from their mother than Jason did.

• Shelly and Jason had different mutations occur in the 46 chromosomes they inherited from their mother and father.

• Shelly and Jason inherited different combinations of 23 chromosomes from their mother and 23 chromosomes from their father.

In dragons, the allele B produces blue body color. The allele b produces green body color. The B allele is dominant to the b allele.

A dragon with genotype Bb is crossed with a dragon with genotype bb. What percent of the offspring are expected to have green body color?

• 0%

• 25%

• 50%

• 100%

Tags

NGSS.MS-LS3-2

In dragons, green striped belly (T) is dominant to purple striped belly (t). If two dragons heterozygous for green striped belly are crossed, what are the possible genotypes of the offspring?

• Tt only

• TT, tt only

• Tt, tt only

• TT, Tt, and tt

In a dragon that has red ear frills, red ear frills (E) is completely dominant to yellow frill color, (e). If the dragon is heterozygous for frill color, which alleles will be carried by the offspring it produces?

• E and e

• E only

• e only

• Ee only

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The gene for no polka dots (D) is dominant over the gene for polka dots (d). Two non-polka dot dragons have a polka dot dragon. Which genotypes make this possible?

• The mother and father are both homozygous non-polka dot (DD).

• The mother is homozygous non-polka dot (DD) and the father is heterozygous non-polka dot (Dd).

• The mother is heterozygous non-polka dot (Dd), and the father is homozygous non-polka dot (DD).

• The mother and the father are both heterozygous non-polka dot (Dd).

In dragons, the allele for purple wings (Q) is dominant to the allele for pink wings (q). Based on the diagram, an offspring with pink wings is indicated in

• Box 1

• Box 4

• Boxes 2 and 3

• Boxes 1,2, and 3

Tags

NGSS.MS-LS4-4